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EX21 Research Compound Biological Microscope

Name: EX21 Research Compound Biological Microscope
Brand: AMADA Microscope

The EX21 Research Compound Biological Microscope is a standard compound microscope designed for routine laboratory inspection and teaching tasks.

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Product Overview

The EX21 Research Compound Biological Microscope is a standard compound microscope designed for routine laboratory inspection and teaching tasks. It features a 10X eyepiece and a 40X objective, providing 400X magnification with a 160mm tube length. The mechanical stage with a 110mm x 110mm travel range supports slide handling and movement during observation. A built-in 3W LED illuminator provides consistent lighting from below the stage, and the coarse and fine focus controls allow precise depth adjustment across the sample.

Optical systemCompound
Focus systemCoarse and fine focus
Focus travel2mm per revolution
DiaphragmAdjustable
Stage clipsYes
Light sourceLED

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Key Benefits

160mm tube length ensures compatibility with standard objectives and eyepieces across the biological microscope range
400X magnification with 10X eyepiece and 40X objective covers most routine biological sample inspection needs
Mechanical stage with 110mm x 110mm travel allows precise slide positioning and scanning across large samples
Built-in 3W LED illuminator provides stable, low-heat lighting without requiring external power or bulbs
Coarse and fine focus controls enable smooth depth adjustment for clear imaging at different focal planes

Application Scenarios

Routine inspection of blood smears, tissue sections and microorganisms in clinical or teaching labs
Classroom demonstrations where multiple students view the same slide through a shared eyepiece
Student lab sessions in biology, microbiology or medical training programs
Basic quality checks of prepared slides in a teaching or research laboratory
Entry-level research tasks requiring consistent magnification and stable illumination

Who It Is For

Teaching laboratories in secondary schools and universities
Clinical and veterinary labs performing basic sample analysis
Research assistants conducting preliminary biological sample checks
Students in biology and medical science programs
Entry-level quality control staff in pharmaceutical or biotech labs

Problems It Solves

A fixed magnification microscope without a mechanical stage forces the operator to manually move the slide, increasing error risk
Low-intensity or flickering lighting sources require frequent bulb replacement and cause inconsistent image quality
Lack of focus precision makes it difficult to move between different focal layers in thick samples
Incompatible tube lengths between objectives and eyepieces lead to image distortion or loss of focus
No stage movement control limits the ability to scan large or detailed slides efficiently

Technical Features

Compound optical system with 160mm tube length for standard objective and eyepiece compatibility
10X eyepiece with 18mm field number for a wide viewing area
40X objective with 0.65 numerical aperture for clear imaging of biological specimens
Mechanical stage with 110mm x 110mm travel range for precise slide positioning
Built-in 3W LED illuminator with adjustable brightness for consistent bottom lighting
Coarse and fine focus controls with 2mm focus travel per revolution
Stage clips to secure slides during observation
Adjustable diaphragm to control light intensity and improve contrast

Specifications

Optical system	Compound
Focus system	Coarse and fine focus
Focus travel	2mm per revolution
Diaphragm	Adjustable
Stage clips	Yes
Light source	LED
Power supply	Built-in, no external supply needed

Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.

Customization Options

Optional 10X eyepiece with different field numbers (F.N.15, F.N.20) for wider or narrower fields
Optional 100X objective with oil immersion capability for higher resolution
Optional 4X and 10X objectives to expand the magnification range
Optional 15X eyepiece for higher magnification at the expense of field size
Optional stage with different travel ranges or additional slide holders

Comparison With Other Options

EX21 without mechanical stage	The standard EX21 includes a mechanical stage with 110mm x 110mm travel, allowing precise slide movement without manual handling, reducing operator error.
EX21 with 100X objective	The standard EX21 uses a 40X objective; the 100X objective is optional and requires oil immersion, which adds complexity and maintenance.
LED illuminator vs. halogen lamp	The built-in 3W LED provides stable, low-heat lighting without bulb replacement; halogen lamps require frequent replacement and generate more heat

Use Guide

Adjust the interpupillary distance to match your eyes before focusing to avoid eye strain
Start with the lowest magnification objective to locate the sample, then switch to higher magnification
Use the coarse focus to bring the image into approximate focus, then use the fine focus for sharpness
Adjust the diaphragm to control light intensity and improve contrast on transparent samples
For oil immersion, use the 100X objective with immersion oil and clean the lens immediately after use